Finding the Fourth Proportional to 5,613.72, 7,748.42 and 3,316.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,613.72 : 7,748.42 = 3,316.12 : x
2. Step 2: Convert to fraction form
   5,613.72/7,748.42 = 3,316.12/x
3. Step 3: Cross multiply
   5,613.72x = 7,748.42 × 3,316.12
4. Step 4: Simplify right side
   5,613.72x = 25,694,679.45
5. Step 5: Solve for x
   x = 25,694,679.45/5,613.72
6. Step 6: Final answer
   x = 4,577.12